str = "python java sql shell scala"

# 字符串转换成列表
language = str.split(" ")
print(language)

# JOIN
print("分隔符".join(language))

# 99乘法表

print("\n".join(["\t".join(["{} * {} = {}".format(j, i, i * j) for j in range(1, i + 1)]) for i in range(1, 10)]))
